Improvement in coal-stoves



which- UNITED STATES PATENT OFFICE.

IMPROVEMENT lN COAL-STOVES.

Specification forming part of Letters Patent No. 49,165, dated August 1, 1865.

To all whom it may concern:

Be it known that I, JAMEs SPEAR. of the city and county of Philadelphia, and State of Pennsylvania, have invented an Improvement in Stoves; and I do hereby declare that the following isa full and exactdescription thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification, in

Figure represents a section of the body of a stove, showing the pipe-collar A and the knob ot' the damper-rod B. Fig. 2 represents the section with thefront part removed, showing the damper 0 covering the mouth of the pipe-collar A. Fig. 3 represents the section with the damper 0 open, showing the mouth of the pipe-collar A. Fig. 4 represents the damper O, hinge I, damper'rod B, and holeO in the damper.

It is a well-known fact that ordinary stoves with a direct draft will burn too. rapidly during cold weather, unless some means is provided to check the draft, and particularly in that class of stoves which are not constructed entirely air-tight at the bottom. In this case a damper in the pipe is resorted to in order to check the draft. This cannot be put in the pipe without taking it down and having a damper made to suit the pipe. These dampers are generally put in the pipe in such a manner that when closed they frequently shut Ofl' the draft of the pipe entirely, leaving no escape of the gas up the chimney, consequently all the gas is thrown into the room, to the great annoyance of those occupying it, and if the damper was left in this condition for a length of time would deaden the fire out. Again,

there are dampers used in pipes which dampers are so badly constructed that when the said dampers are open they fill up one-half the capacity of the pipe, and prevent the stove from drawing when a fresh fire is required to be kindled. Such dampers cannot be used in pipes in connection with stoves burning bitumy damper is opened, I give the pipe the full benefit of its capacity in carrying OK the great volume of smoke whenkindling a fire, and after the smoke has passed ofi the damper can i be closed, thus retaining a great portion of the heat in the stove that otherwisewould pass up the chimney; at the same time the hole in the center of the damper allows the stove sufiicient draft to keep the fire burning, thus lesseniiig the consumption of fuel and making a more regular and uniform heat than a stove not provided with such a damper. This will apply to all stoves having simply a direct draft.

To enable those skilled in the art to make i of metal over the mouth of the pipe-collar inside of the stove. This round piece of metal is to be provided with a hole in the center in proportion to the size of the stove in which it is used, and the size of the pipe-collar over which it covers. This damper may be provided with perforations or notches around its i edge which would be equivalent to one large I hole, and would answer the same purpose. It is also to be provided with a rod to open and shut it at pleasure; also with a hinge, a portion of which is riveted to the inside of the stove, near the month of the pipe-collar. damper is shown in Fig. 4, and when the rod is drawn outit opens the damper, giving the mouth of the pipe-collar its full capacity of draft, and when closed the stove has suflicient draft through the center of the damper.

I am aware that dampers havebeen used in stoves for the purpose of changing thecurrent of the draft and throwing it around other portions of the stove; but this simply I do not claim 5 but What I do claim, and wish to secure by Letters Patent, isy The damperO, with a hole in the center, or its equivalent, placed inside a stove having a direct draft, and arranged and operated in the manner and for the purpose herein set forth.

JAMES SPEAR.

Witnesses:

GEO. FABER, GEO. W. Fox.

This it 

